Objective : Resolution to this error, with IIS 7 and 8 server.

To use a json file in your local server,  json extension should be recognized as a static file. In this example I used a desktop with Windows 8 Home Premium (64 bit) for this example.

Now Open IIS manager using windows /search option

On the MIME configuration pane, find "Add" menu under Actions column and then add "json extension as shown below.

Add "json" extension to MIME type in IIS 7and * manager.

Now note the extension was added in the list of MIME type.

Now you are ready to use file with json extension